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CFD study of oil-jet gear interaction flow phenomena in spur gears

Keller, Marc C.; Kromer, Christian; Cordes, Laura; Schwitzke, Corina; Bauer, Hans-Jörg

Abstract:
Oil-jet lubrication and cooling of high-speed gears is frequently employed in aeronautical systems, such as novel high-bypass civil aero engines based on the geared turbofan technology. Using such oil-jet system, practitioners aim to achieve high cooling rates on the flanks of the highly thermally loaded gears with minimum oil usage. Thus, for an optimal design, detailed knowledge about the flow processes is desired. These involve the oil exiting the nozzle, the oil impacting on the gear teeth, the oil spreading on the flanks, the subsequent oil fling-off, as well as the effect of the design parameters on the oil flow. Better understanding of these processes will improve the nozzle design phase, e.g. regarding the nozzle positioning and orientation, as well as the nozzle sizing and operation.
Most related studies focus on the impingement depth to characterize the two-phase flow. However, the level of information of this scalar value is rather low for a complete description of the highly dynamic three-dimensional flow. Motivated by the advancements in numerical methods and the computational resources available nowadays, the investigation of the oil-jet gear interaction by means of computational fluid dynamics (CFD) has come into focus lately. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000120132
Veröffentlicht am 13.07.2020
Originalveröffentlichung
DOI: 10.1017/aer.2020.44
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Thermische Strömungsmaschinen (ITS)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 09.2020
Sprache Englisch
Identifikator ISSN: 0001-9240, 2059-6464
KITopen-ID: 1000120132
Erschienen in The aeronautical journal
Band 124
Heft 1279
Seiten 1301-1317
Vorab online veröffentlicht am 10.06.2020
Schlagwörter Gear lubrication and cooling; Two-phase flow; Volume-of-fluid (VOF) method
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